Server-side sorting for execution search results

Sorting now applies to the entire result set via ClickHouse ORDER BY
instead of only sorting the current page client-side. Default sort
order is timestamp descending. Supported sort columns: startTime,
status, agentId, routeId, correlationId, durationMs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/executions/ResultsTable.tsx

@@ -1,10 +1,11 @@
-import { useState, useMemo } from 'react';
+import { useState } from 'react';
 import type { ExecutionSummary } from '../../api/types';
 import { StatusPill } from '../../components/shared/StatusPill';
 import { DurationBar } from '../../components/shared/DurationBar';
 import { AppBadge } from '../../components/shared/AppBadge';
 import { ProcessorTree } from './ProcessorTree';
 import { ExchangeDetail } from './ExchangeDetail';
+import { useExecutionSearch } from './use-execution-search';
 import styles from './ResultsTable.module.css';
 
 interface ResultsTableProps {
@@ -24,31 +25,6 @@ function formatTime(iso: string) {
   });
 }
 
-function compareFn(a: ExecutionSummary, b: ExecutionSummary, col: SortColumn, dir: SortDir): number {
-  let cmp = 0;
-  switch (col) {
-    case 'startTime':
-      cmp = a.startTime.localeCompare(b.startTime);
-      break;
-    case 'status':
-      cmp = a.status.localeCompare(b.status);
-      break;
-    case 'agentId':
-      cmp = a.agentId.localeCompare(b.agentId);
-      break;
-    case 'routeId':
-      cmp = a.routeId.localeCompare(b.routeId);
-      break;
-    case 'correlationId':
-      cmp = (a.correlationId ?? '').localeCompare(b.correlationId ?? '');
-      break;
-    case 'durationMs':
-      cmp = a.durationMs - b.durationMs;
-      break;
-  }
-  return dir === 'asc' ? cmp : -cmp;
-}
-
 interface SortableThProps {
   label: string;
   column: SortColumn;
@@ -76,21 +52,12 @@ function SortableTh({ label, column, activeColumn, direction, onSort, style }: S
 
 export function ResultsTable({ results, loading }: ResultsTableProps) {
   const [expandedId, setExpandedId] = useState<string | null>(null);
-  const [sortColumn, setSortColumn] = useState<SortColumn | null>(null);
-  const [sortDir, setSortDir] = useState<SortDir>('desc');
-
-  const sortedResults = useMemo(() => {
-    if (!sortColumn) return results;
-    return [...results].sort((a, b) => compareFn(a, b, sortColumn, sortDir));
-  }, [results, sortColumn, sortDir]);
+  const sortColumn = useExecutionSearch((s) => s.sortField);
+  const sortDir = useExecutionSearch((s) => s.sortDir);
+  const setSort = useExecutionSearch((s) => s.setSort);
 
   function handleSort(col: SortColumn) {
-    if (sortColumn === col) {
-      setSortDir((d) => (d === 'asc' ? 'desc' : 'asc'));
-    } else {
-      setSortColumn(col);
-      setSortDir('desc');
-    }
+    setSort(col);
   }
 
   if (loading && results.length === 0) {
@@ -124,7 +91,7 @@ export function ResultsTable({ results, loading }: ResultsTableProps) {
           </tr>
         </thead>
         <tbody>
-          {sortedResults.map((exec) => {
+          {results.map((exec) => {
             const isExpanded = expandedId === exec.executionId;
             return (
               <ResultRow

ui/src/pages/executions/use-execution-search.ts

@@ -9,6 +9,9 @@ function todayMidnight(): string {
   return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T00:00`;
 }
 
+type SortColumn = 'startTime' | 'status' | 'agentId' | 'routeId' | 'correlationId' | 'durationMs';
+type SortDir = 'asc' | 'desc';
+
 interface ExecutionSearchState {
   status: string[];
   timeFrom: string;
@@ -22,6 +25,8 @@ interface ExecutionSearchState {
   live: boolean;
   offset: number;
   limit: number;
+  sortField: SortColumn;
+  sortDir: SortDir;
 
   toggleLive: () => void;
   setStatus: (statuses: string[]) => void;
@@ -35,6 +40,7 @@ interface ExecutionSearchState {
   setAgentId: (v: string) => void;
   setProcessorType: (v: string) => void;
   setOffset: (v: number) => void;
+  setSort: (col: SortColumn) => void;
   clearAll: () => void;
   toSearchRequest: () => SearchRequest;
 }
@@ -52,6 +58,8 @@ export const useExecutionSearch = create<ExecutionSearchState>((set, get) => ({
   live: true,
   offset: 0,
   limit: 25,
+  sortField: 'startTime',
+  sortDir: 'desc',
 
   toggleLive: () => set((state) => ({ live: !state.live })),
   setStatus: (statuses) => set({ status: statuses, offset: 0 }),
@@ -71,6 +79,12 @@ export const useExecutionSearch = create<ExecutionSearchState>((set, get) => ({
   setAgentId: (v) => set({ agentId: v, offset: 0 }),
   setProcessorType: (v) => set({ processorType: v, offset: 0 }),
   setOffset: (v) => set({ offset: v }),
+  setSort: (col) =>
+    set((state) => ({
+      sortField: col,
+      sortDir: state.sortField === col && state.sortDir === 'desc' ? 'asc' : 'desc',
+      offset: 0,
+    })),
   clearAll: () =>
     set({
       status: ['COMPLETED', 'FAILED', 'RUNNING'],
@@ -83,6 +97,8 @@ export const useExecutionSearch = create<ExecutionSearchState>((set, get) => ({
       agentId: '',
       processorType: '',
       offset: 0,
+      sortField: 'startTime',
+      sortDir: 'desc',
     }),
 
   toSearchRequest: (): SearchRequest => {
@@ -102,6 +118,8 @@ export const useExecutionSearch = create<ExecutionSearchState>((set, get) => ({
       processorType: s.processorType || undefined,
       offset: s.offset,
       limit: s.limit,
+      sortField: s.sortField,
+      sortDir: s.sortDir,
     };
   },
 }));